Variety traits
Reversion virus
In crop production, the term refers to two distinct concepts: a decorative trait characterized by an increased number of petals in flowers, or a dangerous viral disease of blackcurrants that causes sterility.
Mentioned in descriptions 16 231 varieties reference book.
In ornamental horticulture, double flowering is a varietal characteristic expressed by an increased number of petals in a flower to enhance aesthetic appeal. In the case of blackcurrants, double flowering, or reversion, manifests as a viral disease in which flowers are deformed into purple outgrowths, leaves lose their shape, and the plant becomes sterile.
This trait is assessed as a qualitative phenotypic indicator. In ornamental crops, double flowering is recorded during variety trials either visually or by using scoring systems for ornamental quality. Regarding currants, double flowering is considered a critical symptom, the presence of which requires phytosanitary culling of infected specimens.
Resistance of a variety to pathological reversion is determined by the genetic ability to withstand the virus and its vector, the currant bud mite. When choosing planting material for a garden, preference should be given to varieties with proven genetic resistance, as there are no numerical units of measurement for this trait.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
hybrids between Pelargonium peltatum and Pelargonium zonale · Ivy-leaved geranium
Mitchell Eugene Hanes
Lactuca sativa L. · Lettuce
Vilmorin-Mikado S.A.S.
Dianthus L. · Carnation
William E. DUFFETT (US)/JESSEL H. WALTER (FR)
Chrysanthemum L. · Chrysanthemum
Arie Gerard Post
Gerbera L. · Gerbera
JAN L. EVELEENS
Solanum lycopersicum L. · Tomato
Syngenta Crop Protection AG
Gerbera L. · Gerbera
JAN L. EVELEENS
Dianthus x allwoodii hort. · Allwood pink
Whetman Pinks
Chrysanthemum L. · Chrysanthemum
Deliflor Royalties B.V
Bouvardia Salisb. · Bouvardia
van Zanten Plants b.v
Begonia x tuberhybrida Voss · Tuberous begonia
Valin Charles
Rosa L. · Rose
Weeks Roses
Impatiens walleriana Hook. f. · Busy Lizzie
Tioga Genetics
Chrysanthemum L. · Chrysanthemum
Deliflor Royalties B.V
Calibrachoa Cerv. · Calibrachoa
Westhoff Heinrich|Sudlohn, DE
Rosa L. · Rose
Rumen Conev, Canada/Parminderjit Sandhu, Canada
Rosa L. · Rose
Hans-Juergen Evers
Argyranthemum frutescens (L.) Sch. Bip. · Marguerite daisy
Thomas Michael Cunneen
Lilium L. · Lily
Vletter & Den Haan Beheer B.V
Begonia x tuberhybrida Voss · Tuberous begonia
Valin Charles
Pelargonium peltatum (L.) L'Hér. · Ivy-leaf geranium
Silze GmbH & Co KG
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
Martin Geibel c/o Elsner pac Jungpflanzen GbR
Rosa L. · Rose
Piet Schreurs Holding B.V.
Impatiens walleriana Hook. f. · Busy Lizzie
Jonkers Johanna B.|Andijk, NL / Smit Erik|Enkhuizen, NL